Combine fish sauce, sugar, and black pepper in a small mixing bowl and set aside to allow the flavors to meld.
Heat a wok over high heat and add cooking oil along with shallots, lemongrass, chili, and garlic. Stir fry until fragrant, about one minute.
Add the ground chicken to the wok and break it down using a wooden spoon. Cook until it's golden brown and fully cooked through, roughly one to two minutes.
If using eggs, push the chicken mixture to one side of the wok and add an additional tablespoon of oil before cracking in two eggs. Scramble until set and then mix them back into the chicken.
Add in your cold jasmine rice and pour the prepared sauce mixture around the edge of the wok so it starts sizzling immediately for optimal flavor infusion.
Mix everything thoroughly until each grain of rice is well-coated with sauce. Turn off heat and stir in chopped cilantro before serving warm! Enjoy!